Go to implementer interface => Form builder => list of forms
Click on the “internationalize” icon against that form, which will show you the Keys for each answer and the available names for the answer concepts. For each concept, list of all names for a given locale is shown. Choose one or just type out what you want.

Ideally, you want to create different synonyms for a concept! (I not necessarily agree with your concept name definitions, but thats a different thing)

Note: Although the observation forms will show whatever synonym you have defined, the dashboard will only show observations only in the FSN or short name of that locale.

Example: If I define a concept “supine” and another synonym “lying face upwards” (or just add a text dynamically) and pick “lying face upwards” to be displayed in the form - the form will display just fine. However, the observation display controls may not display “lying face upwards”. Since the observation values do not capture the synonym and just the reference, it is not possible to know what was the synonym that was displayed. So choose your concept name definitions carefully and also for reporting.